I wouldn't say that the pump does not have enough power but in my opinion it's iffy. Why not the Liang D5? XSPC sells a duel bay for that, for that many components that would probably be safer. Also I would put it as pump res 220 CPU chipset 420 470 470 9800 470.
IMO that provides more adequate cooling.
Ps, again IMO, I would never bother to wc the chipset, if your case gets any airflow at all the chipset should be fine, and then that heat stays away from you intense components.
Norton is right on the NB...no real reason to WC it unless you are going to be doing some moderate to heavy overclocking.
I wouldn't really rely on the Rasa kit to push through all that...the kit is great...don't get me wrong, but for all that, you'll want a stronger pump and a lot more radiators than you think. What DD block is it? Can you link to it?
Here is my question...why 3x 470's and a 9800GT? Consider that you will very likely be looking at a minimum of 2x120 worth of radiators per CPU and GPU...so use that to do your math.